Retell AI development and integrations

Retell agents that connect the conversation to your product

I develop the assistant and the software behind its actions: data access, business logic, customer interfaces and operator workflows. You can commission a new Retell integration or bring an existing agent that needs a stronger connection to your systems.

Fix Retell booking, CRM and call transfer failures

If the agent says an appointment is booked but the calendar is empty, the repair starts with the tool request and the actual API result. I can investigate time-zone mismatches, repeated bookings, failed webhooks, missing CRM updates and transfers that leave the caller without help.

We agree on the expected behaviour for available and occupied slots, rescheduling, incomplete details and system outages. A failed write needs a recovery path; a successful action needs a result the assistant can use to confirm what happened.

The backend behind your Retell agent

Prompts describe the conversation; backend tools enforce the rules. A product lookup should return usable information, an order action should validate the current store state, and an unsuccessful API request should produce an explicit recovery path.

• Authenticated endpoints connecting Retell tools to your business APIs
• Input validation, customer or store context and permissions
• Catalogue synchronisation and retrieval where the workflow requires local search
• Call records, transcripts and operator interfaces
• Tenant configuration, usage accounting and subscriptions for SaaS products
• Deployment and documentation for the agreed operating workflow

Improve an existing Retell integration

If an assistant handles conversation but cannot complete the business task, I can review the flow from caller request to API result. We identify missing tools, inconsistent data, failed actions or gaps in the operator interface, then define the changes and acceptance scenarios.

For commerce, those scenarios can include an unavailable product, a changed price, an ambiguous selection or a repeated order request. For reception, they can include incomplete caller details, unavailable scheduling data and a request that needs staff attention.

Retell project questions

Can you connect Retell AI to WooCommerce ordering?

Yes. Slivo is a relevant implementation: product search, visual selection and an order flow connected to WooCommerce. Your store's product structure and ordering rules determine the integration scope.

Can you develop the application around the agent?

Yes. I can build the backend, customer and operator interfaces, authentication, billing and deployment alongside the Retell workflow.

Can you work with our current Retell setup?

Yes. Share the call flow, current tools and the behaviour you want to change. Access to the existing configuration and API documentation lets me assess the work without rebuilding parts that already serve the task.

What should I send for a project estimate?

Your current systems, required call flows, sample interactions, permitted business actions and any delivery constraints. Include the relevant API documentation or an overview of available integrations.

Choosing your voice AI approach

For broader requirements and provider selection, see voice AI development and integrations. If your product uses Vapi, explore Vapi AI development.

Project delivery and handover

We agree on the deliverables and acceptance scenarios before implementation. The handover covers the custom source code, configuration, deployment instructions and the checks used to verify the workflow.

Your team controls the project accounts and credentials. I document external services, usage assumptions and recurring costs, and show how to review failures and change the configuration. Ongoing support can be scoped separately.